Traffic statistics paint a gloomy picture. To help solve their traffic woes, some rapidly growing U.S. cities have simply built more roads. But traffic experts say building more roads is a quick-fix solution that will not alleviate the traffic problem in the long run. Soaring land costs, increasing concern over social and environmental disruptions caused by road-building, and the likelihood that more roads can only lead to more cars and traffic are powerful factors bearing down on a 1950s-style construction program.
The goal of smart-highway technology is to make traffic systems work at optimum efficiency by treating the road and the vehicles traveling on them as an integral transportation system. Proponents of the advanced technology say electronic detection systems, closed circuit television, radio communication, ramp metering, variable message signing, and other smart-highway technology can now be used at a reasonable cost to improve communication between driver
A. an optional solution
B. an expedient solution
C. a ready solution
D. an efficient solution
| C企业和E企业的投标文件是否有效分别说明理由。 |
| {{B}}
Text{{/B}} All over the world, forests are safeguarding the health of the planet itself. They do this {{U}} (26) {{/U}} protecting the soil, providing water and {{U}} (27) {{/U}} the climate. Trees {{U}} (28) {{/U}} soil to mountainsides. Hills {{U}} (29) {{/U}} the trees have been felled lose 500 times as {{U}} (30) {{/U}} soil a year as those with trees. Trees catch and {{U}} (31) {{/U}} rainwater. Their leaves break the impact {{U}} (32) {{/U}} the rains, robbing them of {{U}} (32) {{/U}} destructive power. The roots of trees allow the water to go into the soil, {{U}} (34) {{/U}} gradually releases it to flow down rivers and refill ground-water reserves. Where there are no {{U}} (35) {{/U}}, the rains run in sheets of water off the land, {{U}} (36) {{/U}} th A. that B. it C. what D. which [单选题]气测录井中，气测曲线上的特征表现为全烃和甲烷增高，有少量乙烷，丙烷、丁烷无显示，钻并液的密度下降，黏度上升，槽面上升并见气泡;初步判定钻遇了（）。
A.油层 B.油水层 C.气层 D.lue E.lue [判断题]人工巡道的周期间隔原则上不得超过36小时，特殊情况下不得超过72小时。
A.正确 B.错误 [多选题]公安机关办理王某赌博案件举行听证，遇有下列___情形，听证主持人应当终止听证。（ ）
A.王某要求撤回听证申请 B.王某因意外事件死亡 C.王某扰乱听证秩序，不听劝阻，致使听证无法正常进行 D.王某未经许可中途退出听证 [多选题]严寒气候下安全防护方法有( )
A.消防车在火警出动途中,遇有积雪、冰冻的路面时,要控制车速 B.消防人员在面部、手部等裸露的皮肤上涂抹防冻药 C.水枪手应戴好防静电手套;射水灭火时,要避免将水流射到其他人员的身上。 D.利用地形地物或架设消防梯登高时,应尽可能避开结冰的部位 [多项选择]小章和小胡是中学的同班同学，又来自相邻的山村，还属表亲。高中毕业那年，两人几乎以同样优秀的成绩考进了同一所本科院校。进大学以后，小章的学业成绩仍然优秀，小胡在大一时却出现了多门不及格，在留级线上挣扎的现象。你认为，在小章与小胡之间出现这种显著差异的主要原因是（）。
A. 学习动机 B. 学习习惯 C. 学习方法 D. 学习需要 [单选题]自然界的各种物种之间，都有着_____的联系，共同编织着错综复杂的生物链条。每一根链条的断裂，都会或多或少地影响到整个生态系统的平衡，进而可能招致一些未知的灾难。生活在这个_____的世界，每一个物种都有着它独有的_____，不要等到它成了稀有物种才想着去保护。
依次填入划横线部分最恰当的一项是：
A.千头万绪 休戚与共 意义 B.千丝万缕 互利共荣 价值 C.唇齿相依 互惠共赢 属性 D.密不可分 弱肉强食 贡献 [单项选择]在美国，以直邮作为销售产品或服务的主要途径的企业大约有( )。
A. 20000个 B. 10000个 C. 15000个 D. 3000个 [填空题]C200目前有两种版本，对外宣称为V1.0，V1.1，对内称为（）、（）。
[不定项选择题]A.淡红色
A.淡蓝色 B.淡绿色 C.淡黄色 D.白色 E.麻醉药品处方的颜色（ ）。 我来回答: 提交
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